Jon Butterworth: CERN’s huge particle accelerator is working its way toward full operation and a new phase of exploration. But it is not only the accelerator that has been upgraded – the particle detectors have some new tricks too

CERN will restart its physics rollercoaster in May, at higher energies than ever before. But are you ready for it? Have you learned the lessons of Run 1? What the hell is that thing in the picture? Take this quiz to find out!